fig = plt.figure(figsize=(16,8))

ax1 = fig.add_subplot(121)
ax2 = fig.add_subplot(122)

img1 = ax1.imshow(dat1,cmap=plt.cm.jet,interpolation='nearest',origin='upper')
cbar1 = fig.colorbar(img1,ax=ax1,aspect=50,pad=0.08,shrink=0.9,orientation='horizontal')

m = Basemap(ax=ax2,
            llcrnrlon=-180,urcrnrlon=180,llcrnrlat=-90,urcrnrlat=90,
            area_thresh=10000)
m.drawcoastlines(linewidth=0.4)
m.drawparallels(np.arange( -90, 91,30),linewidth=0.3,color='silver',labels=[1,0,0,0])
m.drawmeridians(np.arange(-180,180,60),linewidth=0.3,color='silver',labels=[0,0,0,1])
m.drawmeridians(np.arange(-180,180,30),linewidth=0.3,color='silver',labels=[0,0,0,0])
img2 = m.imshow(dat2,cmap=plt.cm.jet,interpolation='nearest',origin='upper')
cbar2 = fig.colorbar(img2,ax=ax2,aspect=50,pad=0.08,shrink=0.9,orientation='horizontal')

plt.show(fig)